Multiple milling machine



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Dec. 30, 1924. 1,521,080

` P. W. DIETMANN MULTI PLE MILLI NG MACHINE Filed March l5, 1921 2 Sheets-Sheet 2 Patented Dec. 30, 1924.

intese i sie.

PAUL WILHELM DIETMANN, 9F KALMAB, SVJEDEN.

MULTIPLE MILLING MACHINE..

Applicationfnea Maren 15, 1921. sei-iai no. 452,435.

`machines, which are. provided with a. movable turret or revolving head, which carries Va plurality of milling or boring cutter holders. The main object of the invention is to make it possible to perform a number of Subsequent milling or boring operations on any number of similar work pieces, with the greatest possible exactness without using complicated and costly gigs and fixtures.

To this end the different part-s of the table, which are as usual in milling-'machines movable in two or three directions at right angles to each other, and the parts relatively to which lsaid parts are movable are provided, the former with rigid stop members and the latter with drums, carrying axially adjustable stop members or dogs, or vice versa. lVhen the milling machine is of Vrevolving head type, said drums are rotatable and preferably provided with as many axial series of stop membersas the revolving head has working positions. In-this way, when one work piece has been properly milled and bored, and the corresponding stop members onthe drums are set inV positions corresponding toV the ldifferent operations, any number of similar work pieces may be wrought exactly the same way and to eX- actly the same shape.

The invention is illustrated by the accompanying drawings, in which:

Figure l'is a front elevation of the complete milling machine; i

Fig; 2 is a side elevation;

Fig. 3 is a top plan view; J

Fig. 4 is a central longitudinal section on line 4-4 of Fig. l1;

`Fig. 5 is a vertical "section on line 5-5 of Fig. 2;

F ig. 6 is a vertical section on line 6446 of Fig. 5; and

Fig. 7 is a horizontal section of Fig. 5';

Fig. 8 is a horizontal section on line SWS of Fig. 9 and Fig. 9 is a vertical section on line 9 9 of Fig. 3; Y

Fig. 10 is a vertical section on line 10-10 of Fig. 9.

The drawings show a milling machine with a rotarylierad 1, carrying four cutter shafts or cutter holders arranged at an angle of 90 relatively to each other said cutter holders being adapted by corresponding rotation of the cutter support to be successively moved into operative position above the table 2. The rotary cutter support 1 is rigidly connected to a long tubular neck 3, rotatably mounted in a corresponding bore formed in the stand 4, the upper flange 5 of said stand 4 forming a support for the roe tary cutter support. The neclr 3 is formed with central bearings 7, 8, in which there is mounted a vertical shaft G, driven from the pulley 12, by means of a bevel gear 9, and the spur gear wheels 10, 11 of the usual gear box. The shaft 6 carries at its upper end a beve-l gear wheel 13, meshing with a bevel gear wheel 14 on the main shaft 15, carrying the milling tolls 16, 17.

The bevel gear wheel 13 meshes not only with the bevel gear wheel 14 of the shaft 15, but also with two other bevel gear wheels 419, attac-hed to shafts 21 and 22, respectively. The bevel gear wheels 19 and 2O are loosely mounted on their shafts and may be engaged with, or disengaged from wheels 23, 24, meshing with wheels 25, 2G on the shafts 27, 23 respectively which are situated above the shafts 21, 22 and drive the milling or boring tools 31, 32, (Fig. 3) by means of bevel gears 29, 30. The said tools are mounted in holders 33, 34, respectively, which may be turned in a vertical plane and may be adjusted into any angular position desired by means of Asuitable graduated sca-les. The said cutter holders 33, 34 may also, as shown in Figs. 1 and2, carry a second milling tool 35, 36 the shafts of which are driven from the shafts of the tools 31, 32 by the intermediary of' gear wheels 37, 33, 39, and 40, 41, 42 respectively.

The table 2 is in the usual way movable in the direction as shown by the arrows a Fig. y3, and is carried by the member 43 which isl movable in the direction as shown by the arrows b, Fig. 2, said'member 43 being in turn carried by the bracket 44, .movable in the direction, as shown by thc arrows, c, (Fig. 2).

lil

To control all operations in the direction shown by the arrows. a, the table 2 carries a drum 43 co-operating with a rigid stop member 45, (Fig. 5) carried by the table member 43. In the same way the operations in the directions as shown by the arrows b are controlled by the stop drum 49 and therigid stop member 46 (Fig. 9) and r finally the operations in the direction. as

' of series of axially adustable stop members 51,52 and 58 respectively, the number of series on each drum being preferably the same as the number of operative positions Vof the revolving head; in the. illustrated embodiment of the invention four such positions are provided for. A definite series'of the four series of axially adjustable stopv members of each drum is individual to a delinite operative position of 'the ,revolvinghead 1.` Thus, for instance,

the series of stop members 58 (Figs. 2, 8) of the drum is individual Yto the position (Fig. 2) in which the tool v16 operates and so on. The drums carrying the adjustable stop members may be turned Vto bring the proper series into operative positions, corresponding to lthe position of the revolving head, either manually or automatically'. To enable suoli an'autom'atic adjustment, the revolving head is provided with a toothed rim 54, engaged by the toothed wheels 55, 56 ofV which the wheel rotates the drum 49 by thel intermediary of the shaft 57, (Fig. 9), the bevel gear` wheels'58, 59 and theV key 60,.while the toothed Wheel 56 rotates the .drum 50 directly (F ig. 10). At each quarter of a'revolutioii of the toothed rim 54, (corresponding tothe rotation of the revolving head lxfrom one operative position and into Y that succeeding it) the wheels 55, 56 perform one complete ievolut-ion and a quarter of the succeeding revolution, wherebyV for each operative position of the cutter support the'correspoiiding series of stop members are brought into operative position.

' drum 48 on the table 'member 2 has been l "shown as rotated manually and is turned Vments are shown in detail in Figs. 5, 6, 7.

The table 2 gets its feed motion (in the direction indicated by the arrows a) by'means of thescrew 68, working as usual in a nut 64 and actuated either by the haiidlever 65 or from the bevel gear wheel 66, (Fig. 7

Y member 45.

The

which engages: the bevelgear Wheels 67 68, which are coupled to or uncoupled from the screw 63 by means `of a coupling 69, which maybe brought in either'of its operative positions or in the middle stop position by means of the eccentric pin 70 on the shaft4v soY the tappet 76;.is in itstop position, when the Y table 2 is fed in Vone direction and the tappet 77 in its vtop position, when the table is fed in the opposite direction.. When thetable is stopped, the tappets-76, 77` are in theirV middle position, uncovering the rigid stop Y The mechanism operatesas follows z, a certain position ofthe revolving head, the two stop members 51a and 511 are locked in positions corresponding to the beginning. and end of al certain milling operation. The

adjustable stop member 51a isrbrought to rest Vagainst the rigid stop mem-ber45.

Viii

vVflien the-machine feed is coupled in by the hand leverr72, bringingthe coupling 69i'nV its rightV position (.Fig.,7) Vand the tappet 76 in' its' topV position, thetable 2 starts its movement to the right.- VVlienthe stop member 5lb at the end' of said movement reaches thejoblique top surface of the tappet 76, the latter-is brought ldown in its middle position and the machine feed is uncoupled.V To get an absolutely exact stop position the front surface ofthe stop member ,51b`is then manually,by means ofthe hand'lever 65,-

brought into` co-iitactwith the rigid stopV member 45.l A Y j l.

Figs'. 8,9, and l() show the drinn-49 and stop members 52 aiid46 for controlling the working operations in the directionfas shown by the arrows I) and the corresponding arrangements .forv` feeding. 'the 'table member 43 inthe saine direction. The; machine feed is transferred to thetable meinbei' 43 in the usual wayfby means of a universal joint and the bevel gear ywheel Y 78, one ofV the two bevel gear jvvheelst79,

SO, the shaft 81, the bevel gear 82, the cylindrical gear 83 andv tliescrew 84. For lmanual feed the hand wheel 85 is 'used.

90 which operates the coupling 91,iif'hich `is brought into.engagement with either ot the Wheels 7 9 or 80, according` to the direction of movement of the table part- 43, by means of the hand lever v92. The rigid stop member 46 may be turned out of the Way ofthe stop members 52 by means of the knob, 93. l i

rlhe operation of said mechanism is the following: In a certain position of the revolving head, the tvvo stop members 52 and 521y are adjusted to positions corre sponding to the beginning and end of the operation in the direction as. shown by the arrows Z) to be performed. The adjustable stop member 52a is brought yagainst the front surface of the rigid stop member 46 and the hand lever 92 is turned to the left (Fig. 9) thereby coupling the gear Wheel 79. The table part 43 then moves to the left (Fig. 9) until the rigid stop 46 strikes the stop member 52h, thus bringing the coupling 91 in its middle, inactive position and stopping the feed.

The third drum 5() (Fig. l0) is not provided with automatically disengaging arrangementsl for the feed motion, as the milling machines are 'usually not provided with machine feeding arrangements in the vertical direction as shown by the arrows c. The rigid stop member 47 is identical With the stop member 46 and may be turned outy of the Way of the stop members 53 by means of the knob 94, (Fig. 10). The rigid stop members 46, 47 are so formed and actuated by springs that they retake the operative central position automatically When turned out of the same.

The machine above described is specially adapted for effecting of a plurality of successive milling orboring operations on several similar Work pieces. It is evident, that itis possible to obtain, Without the need of complicated fixing members, exactly uniform operation on the several Work pieces by lixing the latter on the table 2 by means of simple lining members and then adjusting the various series of .stop members 51, 52, to accurately agree with the positions or operative movements of the table at the operation of the iirst Work piece.

I claiml. In a milling machine, the combination with a machine frame, of a Work support ing table movable in three directions at right angles to each other, said table comprising parts movable with respect to said frame and to each other, a rigid stop member and av rotatable drum for each of said directions, each drum having its axis eX- tending in the respective direction and carryinga plurality of axially extending series of axially adjustable stop members to cooperate With said rigid stop member, the rigid stop member and the drum corresponding to each direct-ion being each carried by a separate one of said parts which are movable relatively to each other in the respective direction.

2. In a milling machine, the combination with a machine frame, of a revolving tool supporting head, a Work supporting tab-lc movable in three directions at right angles to each other, said table com rising parts movable with respect to said 1ame and to each other, a rigid AstopI member and a rotatable drum for each of said directions, each drum having its axis extending in the respect-ive direction and carrying a plurality of axially extending series of axially adjustable stop members to co-operate with said rigid stop member, the rigid stop member and thel drum corresponding to each direction being each carried by a separate one of said parts, which aremovable rela tively to each other in the respective direction, and means for automatically turning the drums to bring the proper series of adjustable stop members thereon into operative` position upon the turning of the revolving head,

In testimony whereof I have signed my name.

PAUL VILHELM DIETMANN. 

